Overview
Complex lethal osteochondrodysplasia is an extremely rare and severe bone and cartilage disorder that affects how the skeleton develops before birth. The term 'osteochondrodysplasia' refers to a group of conditions where bones and cartilage do not grow or form properly. When described as 'complex lethal,' it means the condition involves multiple severe skeletal abnormalities that are life-threatening, typically resulting in death before or shortly after birth. Babies with this condition may have very short limbs, an abnormally shaped chest that is too small to allow the lungs to work properly, underdeveloped bones, and other skeletal malformations. The small chest is often the most critical problem because it restricts breathing. Other features can include abnormal curvature of the spine, fractures present at birth, and poor mineralization of bones. Because this condition is so rare and severe, there is currently no cure or effective treatment that can change the outcome. Medical care focuses on comfort and supportive measures. Genetic counseling is important for affected families to understand the cause and the chance of recurrence in future pregnancies. Diagnosis is often made through prenatal ultrasound showing severe skeletal abnormalities, and may be confirmed with genetic testing when available.
Key symptoms:
Very short arms and legsAbnormally small chestSevere breathing difficultiesPoorly formed or soft bonesFractures present at birthAbnormal spine curvatureShort stature or dwarfismUnderdeveloped ribsAbnormal skull shapeReduced movement before birthLimb bowing
Variable
Can be inherited in different ways depending on the underlying gene
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Complex lethal osteochondrodysplasia.
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Specialists
View all specialists →No specialists are currently listed for Complex lethal osteochondrodysplasia.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Complex lethal osteochondrodysplasia.
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Caregiver Resources
NORD Caregiver Resources
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Family & Caregiver Grants
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Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What specific type of osteochondrodysplasia does my baby have, and is the exact genetic cause known?,What is the expected outcome, and what comfort care options are available?,Should we pursue genetic testing to identify the specific gene involved?,What is the chance this could happen again in a future pregnancy?,Are there prenatal testing options available for future pregnancies?,Can you connect us with palliative care and grief support services?,Are there any research studies or registries we could participate in?
Common questions about Complex lethal osteochondrodysplasia
What is Complex lethal osteochondrodysplasia?
Complex lethal osteochondrodysplasia is an extremely rare and severe bone and cartilage disorder that affects how the skeleton develops before birth. The term 'osteochondrodysplasia' refers to a group of conditions where bones and cartilage do not grow or form properly. When described as 'complex lethal,' it means the condition involves multiple severe skeletal abnormalities that are life-threatening, typically resulting in death before or shortly after birth. Babies with this condition may have very short limbs, an abnormally shaped chest that is too small to allow the lungs to work properly
At what age does Complex lethal osteochondrodysplasia typically begin?
Typical onset of Complex lethal osteochondrodysplasia is neonatal. Age of onset can vary across affected individuals.